An enzyme has its specificity due to________________?
A. Substrate B. Structure C. Temperature D. Pressure
Chemistry MCQs
A substance which increases the reactivity of enzyme is called_________________?
A. Promoters B. Inhibitors C. Stimulators D. Non-activators
When the reaction completes in more than one steps rate of reaction will be determined by________________?
A. Fast step B. Slowest step C. All steps D. Molecularity of the reaction
Energy of activation for backward reaction is less than forward reaction for ___________ reactio?
A. Endothermic B. Exothermic C. Moderate D. Fast
Which statement is incorrect about catalyst___________________?
A. it is used in smaller amount B. decrease activation energy C. specific in action D. it affects specific rate constant
Which of the following type of reaction is 3rd order reaction_________________?
A. 2N2O5 = 2N2O4 + O3 B. NO + O3 ? NO2 + O2 C. 2FeCl3 + 6KI ? 2FeI2 + 6KCl + I2 D. None of these
The addition of a catalyst to the reaction system__________________?
A. Increases the rate of forward reaction only B. Increases the rate of reverse reaction C. Increases the rate of forward but decreases the rate of backward reaction D. Increases the rate of forward as well as backward reaction equally
On increasing the temperature the rate of reaction increases mainly because_________________?
A. The activation energy of the reaction increases B. Concentration of the reacting molecules increases C. Collision frequency increases D. None of these
Sum of exponents of molar concentration is called___________________?
A. Order of reaction B. Molecularity C. Rate of reaction D. Average of reaction
In rate expression the concentration of reactants is negative. It shows_______________?
A. Concentration of reactant does not change B. Concentration of product increases C. Concentration of reactant decreases D. Concentration of reactant increases